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What's the Question? If it's Crystal Lattace Energy, you need to review Born-Haber Cycle.
E-choice... Metallic plating is an electrolytic process based upon oxidation-reduction reactions and is a chemical process not physical process.
molality = moles HCl/Kg Solvent Given 30% Soln by mass = 30gHCl/100gSoln Moles HCl = (30g/36g/mol) = 0.833mole Kg Solvent = (100gSoln/1.098g/ml) = 91.1ml = 91.1gms Soln(1.10g/ml 30%HClsoln*)= 100.21gms of 30%HCLSoln = 0.1002Kg Soln = 60%(0.1002Kg) =
Convert milligrams of oxygen to grams, then divide by f.wt O2 (=32) => moles O2. Then apply equation ratios... 15 moles O2 => 6 moles HOH N-moles O2 => x (15/N-molesO2) = (6/X) Solve for X and then multiply by f.wt. HOH (=18g/mole) => grams HOH.
This is a classic titration of hypochlorite in bleach. Usually done into a KI/ClO^- solution => I2 which is titrated with the S2O3^2- until all Red-Brown color is changed to clear solution. The ratio is 2 mole S2O3^2- to 1 mole ClO^-. So use Molarity x
Decomposition of ionic solids are usually endothermic. So throw out 1, 3, & 5. Convert 21g Fe to moles and use the equation ratios.
Work from CuSO4-5H2O + 2IO3^- => Cu(IO3)2 + SO4^2- Convert 0.690g to moles => 0.0027mole Since the equation molar ratio is 1:1 for CuSO4-5H2O & Cu(IO3)2 then the moles of Cu(IO3)2 => 0.0027mole. Convert 0.0027mole Cu(IO3)2 to grams =>
(Molarity x Volume)conc. = (Molarity) x Volume)dilute Substitute and solve for Volume of diluted solution.
Use speed of light equation speed of light(c) = frequency(f) x Wavelength(λ) c = 3 x 10⁸ meters/sec f = 5.93 x 10¹⁴ sec⁻¹ λ = unknown wavelength
Given: Volume of EtOAc = 0.250L = 250ml Density of (EtOAc) = (0.90g/ml) mass EtOAc = (0.90g/ml)(250 ml)= 225g.
